nemesis bird: Chasing feathers: Eternal search for 'Nemesis Bird' that continues to elude sighting
Peter Kaestner, a retired U.S. diplomat and avid birder, aims to become the first person to spot 10,000 avian species. With 9,697 birds identified so far, he is getting close. However, there are a few elusive birds that he has been unable to find, known as "nemesis birds." These birds continue to challenge and elude birders despite their efforts.
Source: indiatimes.com